how can I ajust the afr ratio at idel , I have got a closed loop idel bin. it needs to be a little richer at idel but the rest of the bin works good, [ smells like the timming is to fast, and the adjusting jets are turned in to far on a carbed engine] don't have a cat, tried setting the timming in the bin back 4 degrees ideled smoother but still smells bad. didn't know if there was something I could change besides the 14.7-1 in the synchronized fuel ratio?